Hi guys, I had the problem since forever now. got an hp notebook with enough resources and I'm unsing a usb audio device. OS is windows xp professional SP 3. when I start guitar rig in reaper the system sometimes crashes immediately, quite often it crashes after a couple of minutes, rarely it doesn't crash at all. There is a certain bank in guitar rig I think it's 'FX' and when I click it windows crashes always immediately. the number appearing at the blue screen is 0x0000008E ( 0xC0000047 , 0x804FCF2C , 0xF78B29B0 , 0x00000000 ) I found out that "0x0000008E: KERNEL_MODE_EXCEPTION_NOT_HANDLED" and "STATUS_SEMAPHORE_LIMIT_EXCEEDED is meant by 0xC0000047" but i have no clue what that's supposed to mean :) please help! .matt.